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I'm migrating POP users to Exchange Online. They are using Windows 7 & Outlook 2010. One users Exchange account is failing to add to his Outlook profile properly. His data file shows as being a private folder instead of an OST. Outlook fails to start with the following error:
Cannot open your default e-mail folders. An unexpected error has occurred.
Mapi was unable to load the information service EMSMdB.DLL
Be sure the service is correctly installed and configured
Suggestions would be most welcome.
From the error message, it seems that your Outlook crashed.
To solve this issue, please try to follow steps below:
1.Reinstall Office 2010 to fix Outlook.
2.Run Desktop setup to automatically configure your Office desktop apps to work with Microsoft Office 365.
3.Create a new profile to configure your Office365 account.
How is everything going? Do you have any updates about the status of the issue?